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Title: High harmonic fast wave heating and current drive on NSTX-system and experimental plan

Abstract

For the National Spherical Torus Experiment (NSTX) device, High Harmonic Fast Wave (HHFW) heating has been selected for its strong single pass absorption on electrons as the initial heating and current drive scenario. A frequency of 30 MHz has been selected (f{approx}16 f{sub cd}). The waves will be launched into the plasma from a twelve element phased antenna array. Six transmitters will feed the elements in pairs of six independently phasable subsections. Modeling predicts strong single pass damping (>40%) for temperatures as low as 250 eV. As the ion temperature is increased ion damping may compete with the electron absorption for ion temperatures >1.5 keV. Experiments will be aimed at demonstrating HHFW heating of a small aspect ratio device leading towards the goal of fully non-inductive operation. In the first year of operation the HHFW system will be brought into operation and plasma heating under a variety of plasma conditions will be explored. In the second year, when current drive diagnostics are expected to be available, an exploration of HHFW current drive will begin. (c) 1999 American Institute of Physics.

Authors:
 [1];  [1];  [2];  [1];  [1];  [1];  [1];  [1];  [1];  [3]
  1. Princeton Plasma Physics Laboratory, P.O. Box 451 Princeton, New Jersey (United States)
  2. Oak Ridge National Laboratory, Oak Ridge, Tennessee (United States)
  3. Oak Ridge National Laboratory, Oak Ridge, Tennessee (United States) (and others)
Publication Date:
OSTI Identifier:
20216689
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 485; Journal Issue: 1; Other Information: PBD: 20 Sep 1999; Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; TOKAMAK TYPE REACTORS; HIGH-FREQUENCY HEATING; RF SYSTEMS; CURRENT-DRIVE HEATING; ANTENNAS; MAGNETIC FIELDS

Citation Formats

Wilson, J. R., Bernabei, S., Carter, M., Ellis, R. III, Hosea, J. C., LeBlanc, B., Majeski, R., Menard, J., Phillips, C. K., and Ryan, P. High harmonic fast wave heating and current drive on NSTX-system and experimental plan. United States: N. p., 1999. Web. doi:10.1063/1.59743.
Wilson, J. R., Bernabei, S., Carter, M., Ellis, R. III, Hosea, J. C., LeBlanc, B., Majeski, R., Menard, J., Phillips, C. K., & Ryan, P. High harmonic fast wave heating and current drive on NSTX-system and experimental plan. United States. doi:10.1063/1.59743.
Wilson, J. R., Bernabei, S., Carter, M., Ellis, R. III, Hosea, J. C., LeBlanc, B., Majeski, R., Menard, J., Phillips, C. K., and Ryan, P. Mon . "High harmonic fast wave heating and current drive on NSTX-system and experimental plan". United States. doi:10.1063/1.59743.
@article{osti_20216689,
title = {High harmonic fast wave heating and current drive on NSTX-system and experimental plan},
author = {Wilson, J. R. and Bernabei, S. and Carter, M. and Ellis, R. III and Hosea, J. C. and LeBlanc, B. and Majeski, R. and Menard, J. and Phillips, C. K. and Ryan, P.},
abstractNote = {For the National Spherical Torus Experiment (NSTX) device, High Harmonic Fast Wave (HHFW) heating has been selected for its strong single pass absorption on electrons as the initial heating and current drive scenario. A frequency of 30 MHz has been selected (f{approx}16 f{sub cd}). The waves will be launched into the plasma from a twelve element phased antenna array. Six transmitters will feed the elements in pairs of six independently phasable subsections. Modeling predicts strong single pass damping (>40%) for temperatures as low as 250 eV. As the ion temperature is increased ion damping may compete with the electron absorption for ion temperatures >1.5 keV. Experiments will be aimed at demonstrating HHFW heating of a small aspect ratio device leading towards the goal of fully non-inductive operation. In the first year of operation the HHFW system will be brought into operation and plasma heating under a variety of plasma conditions will be explored. In the second year, when current drive diagnostics are expected to be available, an exploration of HHFW current drive will begin. (c) 1999 American Institute of Physics.},
doi = {10.1063/1.59743},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 485,
place = {United States},
year = {1999},
month = {9}
}